Prehnite and Lazurite Physical Properties

Prehnite

Lazurite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.80-2.952.75

1 7.18

1.5 Fracture

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Distinct on [001]

Imperfect on {110}

1.7 Mohs Hardness

6-6.55.5

2 10

1.8 Chemical Composition

Ca₂Al₂Si₃O₁₂(OH)

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Prehnite and Lazurite Chemical Formula

While comparing Prehnite and Lazurite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Prehnite and Lazurite chemical formula.

Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)
Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

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Prehnite and Lazurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Prehnite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Prehnite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Prehnite is 2.75 whereas that of Lazurite is 2.75.